1 files changed, 140 insertions, 0 deletions

diff --git a/include/asm-m68k/processor.h b/include/asm-m68k/processor.h
new file mode 100644
index 000000000000..df1575db32af
--- /dev/null
+++ b/include/asm-m68k/processor.h
@@ -0,0 +1,140 @@
+/*
+ * include/asm-m68k/processor.h
+ *
+ * Copyright (C) 1995 Hamish Macdonald
+ */
+
+#ifndef __ASM_M68K_PROCESSOR_H
+#define __ASM_M68K_PROCESSOR_H
+
+/*
+ * Default implementation of macro that returns current
+ * instruction pointer ("program counter").
+ */
+#define current_text_addr() ({ __label__ _l; _l: &&_l;})
+
+#include <linux/config.h>
+#include <asm/segment.h>
+#include <asm/fpu.h>
+#include <asm/ptrace.h>
+
+static inline unsigned long rdusp(void)
+{
+        unsigned long usp;
+
+        __asm__ __volatile__("move %/usp,%0" : "=a" (usp));
+        return usp;
+}
+
+static inline void wrusp(unsigned long usp)
+{
+        __asm__ __volatile__("move %0,%/usp" : : "a" (usp));
+}
+
+/*
+ * User space process size: 3.75GB. This is hardcoded into a few places,
+ * so don't change it unless you know what you are doing.
+ */
+#ifndef CONFIG_SUN3
+#define TASK_SIZE       (0xF0000000UL)
+#else
+#ifdef __ASSEMBLY__
+#define TASK_SIZE       (0x0E000000)
+#else
+#define TASK_SIZE       (0x0E000000UL)
+#endif
+#endif
+
+/* This decides where the kernel will search for a free chunk of vm
+ * space during mmap's.
+ */
+#ifndef CONFIG_SUN3
+#define TASK_UNMAPPED_BASE      0xC0000000UL
+#else
+#define TASK_UNMAPPED_BASE      0x0A000000UL
+#endif
+#define TASK_UNMAPPED_ALIGN(addr, off)  PAGE_ALIGN(addr)
+
+struct task_work {
+        unsigned char sigpending;
+        unsigned char notify_resume;    /* request for notification on
+                                           userspace execution resumption */
+        char          need_resched;
+        unsigned char delayed_trace;    /* single step a syscall */
+        unsigned char syscall_trace;    /* count of syscall interceptors */
+        unsigned char memdie;           /* task was selected to be killed */
+        unsigned char pad[2];
+};
+
+struct thread_struct {
+        unsigned long  ksp;             /* kernel stack pointer */
+        unsigned long  usp;             /* user stack pointer */
+        unsigned short sr;              /* saved status register */
+        unsigned short fs;              /* saved fs (sfc, dfc) */
+        unsigned long  crp[2];          /* cpu root pointer */
+        unsigned long  esp0;            /* points to SR of stack frame */
+        unsigned long  faddr;           /* info about last fault */
+        int            signo, code;
+        unsigned long  fp[8*3];
+        unsigned long  fpcntl[3];       /* fp control regs */
+        unsigned char  fpstate[FPSTATESIZE];  /* floating point state */
+        struct task_work work;
+};
+
+#define INIT_THREAD  {                                                  \
+        ksp:    sizeof(init_stack) + (unsigned long) init_stack,        \
+        sr:     PS_S,                                                   \
+        fs:     __KERNEL_DS,                                            \
+        info:   INIT_THREAD_INFO(init_task)                             \
+}
+
+/*
+ * Do necessary setup to start up a newly executed thread.
+ */
+static inline void start_thread(struct pt_regs * regs, unsigned long pc,
+                                unsigned long usp)
+{
+        /* reads from user space */
+        set_fs(USER_DS);
+
+        regs->pc = pc;
+        regs->sr &= ~0x2000;
+        wrusp(usp);
+}
+
+/* Forward declaration, a strange C thing */
+struct task_struct;
+
+/* Free all resources held by a thread. */
+static inline void release_thread(struct task_struct *dead_task)
+{
+}
+
+/* Prepare to copy thread state - unlazy all lazy status */
+#define prepare_to_copy(tsk)    do { } while (0)
+
+extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
+
+/*
+ * Free current thread data structures etc..
+ */
+static inline void exit_thread(void)
+{
+}
+
+extern unsigned long thread_saved_pc(struct task_struct *tsk);
+
+unsigned long get_wchan(struct task_struct *p);
+
+#define KSTK_EIP(tsk)   \
+    ({                  \
+        unsigned long eip = 0;   \
+        if ((tsk)->thread.esp0 > PAGE_SIZE && \
+            (virt_addr_valid((tsk)->thread.esp0))) \
+              eip = ((struct pt_regs *) (tsk)->thread.esp0)->pc; \
+        eip; })
+#define KSTK_ESP(tsk)   ((tsk) == current ? rdusp() : (tsk)->thread.usp)
+
+#define cpu_relax()     barrier()
+
+#endif